********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 30 March 2017 Vol. XXX No. 013 ______________________________________________________________________ GENERAL INFORMATION: To receive this information electronically, contact: ser7@maia.usno.navy.mil or use MJD = Julian Date - 2 400 000.5 days UT2-UT1 = 0.022 sin(2*pi*T) - 0.012 cos(2*pi*T) - 0.006 sin(4*pi*T) + 0.007 cos(4*pi*T) where pi = 3.14159265... and T is the date in Besselian years. TT = TAI + 32.184 seconds DUT1= (UT1-UTC) transmitted with time signals = +0.4 seconds beginning 30 Mar 2017 at 0000 UTC Beginning 1 January 2017: TAI-UTC = 37.000 000 seconds *********************************************************************** * * * Please note that daily and Bulletin A EOP data can be obtained from * * the primary Earth Orientation (EO) servers at: * * http://maia.usno.navy.mil ftp://maia.usno.navy.mil * * and from the backup EO server at: * * http://toshi.nofs.navy.mil ftp://toshi.nofs.navy.mil * * * * An additional backup mirror of the daily and Bulletin A EOP data * * is now hosted by NASA's Archive of Space Geodesy Data server at: * * ftp://cddis.gsfc.nasa.gov/pub/products/iers * * Daily EOP data will be uploaded here at 18:00 UTC, and * * Bulletin A EOP data should by available by 20:00 UTC. * * * * As of Bulletin A Vol. XXX, No. 013, on 30 March 2017, we have * * adjusted the IERS RS/PC solution for UT1-UTC, resulting in a change * * of less than 5 us. * * * * Distribution statement A. Approved for public release: * * distribution unlimited. * * * *********************************************************************** ________________________________________________________________________ The contributed observations used in the preparation of this Bulletin are available at . The contributed analysis results are based on data from Very Long Baseline Interferometry (VLBI), Satellite Laser Ranging (SLR), the Global Positioning System (GPS) satellites, Lunar Laser Ranging (LLR), and meteorological predictions of variations in Atmospheric Angular Momentum (AAM). ________________________________________________________________________ COMBINED EARTH ORIENTATION PARAMETERS: IERS Rapid Service MJD x error y error UT1-UTC error " " " " s s 17 3 24 57836 0.00547 .00009 0.36479 .00009 0.484854 0.000012 17 3 25 57837 0.00505 .00009 0.36669 .00009 0.483369 0.000012 17 3 26 57838 0.00490 .00009 0.36844 .00009 0.481707 0.000013 17 3 27 57839 0.00493 .00009 0.37024 .00009 0.479897 0.000013 17 3 28 57840 0.00504 .00009 0.37197 .00009 0.477987 0.000013 17 3 29 57841 0.00523 .00009 0.37353 .00009 0.475997 0.000013 17 3 30 57842 0.00535 .00009 0.37506 .00009 0.474022 0.000013 _______________________________________________________________________ PREDICTIONS: The following formulas will not reproduce the predictions given below, but may be used to extend the predictions beyond the end of this table. x = 0.1099 - 0.0741 cos A + 0.0481 sin A - 0.0328 cos C - 0.0345 sin C y = 0.3709 + 0.0420 cos A + 0.0695 sin A - 0.0345 cos C + 0.0328 sin C UT1-UTC = 0.4959 - 0.00118 (MJD - 57850) - (UT2-UT1) where A = 2*pi*(MJD-57842)/365.25 and C = 2*pi*(MJD-57842)/435. TAI-UTC(MJD 57843) = 37.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-57842)**0.80 S t = 0.00025 (MJD-57842)**0.75 Estimated accuracies are: Predictions 10 d 20 d 30 d 40 d Polar coord's 0.004 0.007 0.010 0.013 UT1-UTC 0.0014 0.0024 0.0032 0.0040 MJD x(arcsec) y(arcsec) UT1-UTC(sec) 2017 3 31 57843 0.0055 0.3765 0.47218 2017 4 1 57844 0.0057 0.3780 0.47050 2017 4 2 57845 0.0059 0.3794 0.46899 2017 4 3 57846 0.0063 0.3809 0.46762 2017 4 4 57847 0.0067 0.3823 0.46635 2017 4 5 57848 0.0072 0.3838 0.46513 2017 4 6 57849 0.0077 0.3853 0.46388 2017 4 7 57850 0.0083 0.3869 0.46257 2017 4 8 57851 0.0089 0.3884 0.46118 2017 4 9 57852 0.0095 0.3899 0.45973 2017 4 10 57853 0.0103 0.3915 0.45821 2017 4 11 57854 0.0110 0.3931 0.45669 2017 4 12 57855 0.0117 0.3947 0.45521 2017 4 13 57856 0.0124 0.3963 0.45381 2017 4 14 57857 0.0131 0.3979 0.45250 2017 4 15 57858 0.0139 0.3994 0.45127 2017 4 16 57859 0.0146 0.4010 0.45013 2017 4 17 57860 0.0154 0.4025 0.44907 2017 4 18 57861 0.0161 0.4039 0.44803 2017 4 19 57862 0.0169 0.4054 0.44697 2017 4 20 57863 0.0178 0.4068 0.44583 2017 4 21 57864 0.0186 0.4081 0.44457 2017 4 22 57865 0.0195 0.4094 0.44317 2017 4 23 57866 0.0204 0.4108 0.44160 2017 4 24 57867 0.0214 0.4121 0.43989 2017 4 25 57868 0.0224 0.4133 0.43809 2017 4 26 57869 0.0234 0.4146 0.43628 2017 4 27 57870 0.0244 0.4158 0.43456 2017 4 28 57871 0.0255 0.4171 0.43298 2017 4 29 57872 0.0266 0.4183 0.43158 2017 4 30 57873 0.0277 0.4195 0.43032 2017 5 1 57874 0.0289 0.4207 0.42915 2017 5 2 57875 0.0301 0.4219 0.42799 2017 5 3 57876 0.0313 0.4231 0.42680 2017 5 4 57877 0.0325 0.4242 0.42554 2017 5 5 57878 0.0338 0.4254 0.42422 2017 5 6 57879 0.0350 0.4265 0.42286 2017 5 7 57880 0.0363 0.4276 0.42149 2017 5 8 57881 0.0376 0.4287 0.42015 2017 5 9 57882 0.0389 0.4298 0.41888 2017 5 10 57883 0.0402 0.4308 0.41771 2017 5 11 57884 0.0416 0.4319 0.41666 2017 5 12 57885 0.0429 0.4329 0.41573 2017 5 13 57886 0.0443 0.4338 0.41490 2017 5 14 57887 0.0457 0.4348 0.41416 2017 5 15 57888 0.0471 0.4357 0.41346 2017 5 16 57889 0.0485 0.4366 0.41277 2017 5 17 57890 0.0499 0.4374 0.41204 2017 5 18 57891 0.0514 0.4383 0.41122 2017 5 19 57892 0.0529 0.4391 0.41028 2017 5 20 57893 0.0544 0.4399 0.40918 2017 5 21 57894 0.0559 0.4407 0.40794 2017 5 22 57895 0.0574 0.4415 0.40656 2017 5 23 57896 0.0589 0.4422 0.40512 2017 5 24 57897 0.0605 0.4429 0.40369 2017 5 25 57898 0.0620 0.4436 0.40236 2017 5 26 57899 0.0636 0.4443 0.40118 2017 5 27 57900 0.0652 0.4449 0.40016 2017 5 28 57901 0.0668 0.4455 0.39926 2017 5 29 57902 0.0684 0.4461 0.39842 2017 5 30 57903 0.0700 0.4467 0.39758 2017 5 31 57904 0.0716 0.4472 0.39671 2017 6 1 57905 0.0732 0.4478 0.39580 2017 6 2 57906 0.0749 0.4482 0.39486 2017 6 3 57907 0.0765 0.4487 0.39392 2017 6 4 57908 0.0782 0.4492 0.39302 2017 6 5 57909 0.0798 0.4496 0.39218 2017 6 6 57910 0.0815 0.4500 0.39144 2017 6 7 57911 0.0831 0.4503 0.39081 2017 6 8 57912 0.0848 0.4507 0.39029 2017 6 9 57913 0.0865 0.4510 0.38988 2017 6 10 57914 0.0882 0.4513 0.38955 2017 6 11 57915 0.0898 0.4515 0.38929 2017 6 12 57916 0.0915 0.4518 0.38904 2017 6 13 57917 0.0932 0.4520 0.38877 2017 6 14 57918 0.0949 0.4521 0.38842 2017 6 15 57919 0.0966 0.4523 0.38798 2017 6 16 57920 0.0983 0.4524 0.38742 2017 6 17 57921 0.1000 0.4525 0.38672 2017 6 18 57922 0.1017 0.4526 0.38591 2017 6 19 57923 0.1034 0.4527 0.38501 2017 6 20 57924 0.1051 0.4527 0.38408 2017 6 21 57925 0.1068 0.4527 0.38320 2017 6 22 57926 0.1085 0.4527 0.38243 2017 6 23 57927 0.1102 0.4526 0.38179 2017 6 24 57928 0.1119 0.4525 0.38127 2017 6 25 57929 0.1136 0.4524 0.38082 2017 6 26 57930 0.1152 0.4523 0.38038 2017 6 27 57931 0.1169 0.4521 0.37990 2017 6 28 57932 0.1186 0.4519 0.37936 2017 6 29 57933 0.1203 0.4517 0.37877 2017 6 30 57934 0.1219 0.4515 0.37817 2017 7 1 57935 0.1236 0.4512 0.37760 2017 7 2 57936 0.1252 0.4510 0.37709 2017 7 3 57937 0.1269 0.4506 0.37666 2017 7 4 57938 0.1285 0.4503 0.37634 2017 7 5 57939 0.1301 0.4499 0.37614 2017 7 6 57940 0.1317 0.4496 0.37605 2017 7 7 57941 0.1333 0.4491 0.37605 2017 7 8 57942 0.1349 0.4487 0.37611 2017 7 9 57943 0.1365 0.4482 0.37620 2017 7 10 57944 0.1381 0.4478 0.37627 2017 7 11 57945 0.1397 0.4472 0.37627 2017 7 12 57946 0.1412 0.4467 0.37617 2017 7 13 57947 0.1428 0.4462 0.37594 2017 7 14 57948 0.1443 0.4456 0.37557 2017 7 15 57949 0.1458 0.4450 0.37508 2017 7 16 57950 0.1473 0.4443 0.37451 2017 7 17 57951 0.1488 0.4437 0.37394 2017 7 18 57952 0.1503 0.4430 0.37339 2017 7 19 57953 0.1517 0.4423 0.37290 2017 7 20 57954 0.1532 0.4416 0.37252 2017 7 21 57955 0.1546 0.4409 0.37225 2017 7 22 57956 0.1560 0.4401 0.37203 2017 7 23 57957 0.1574 0.4393 0.37183 2017 7 24 57958 0.1588 0.4385 0.37156 2017 7 25 57959 0.1602 0.4377 0.37120 2017 7 26 57960 0.1615 0.4368 0.37076 2017 7 27 57961 0.1629 0.4359 0.37025 2017 7 28 57962 0.1642 0.4351 0.36974 2017 7 29 57963 0.1655 0.4341 0.36927 2017 7 30 57964 0.1667 0.4332 0.36886 2017 7 31 57965 0.1680 0.4323 0.36856 2017 8 1 57966 0.1692 0.4313 0.36836 2017 8 2 57967 0.1705 0.4303 0.36826 2017 8 3 57968 0.1717 0.4293 0.36824 2017 8 4 57969 0.1728 0.4283 0.36828 2017 8 5 57970 0.1740 0.4272 0.36834 2017 8 6 57971 0.1751 0.4262 0.36837 2017 8 7 57972 0.1762 0.4251 0.36833 2017 8 8 57973 0.1773 0.4240 0.36818 2017 8 9 57974 0.1784 0.4229 0.36788 2017 8 10 57975 0.1794 0.4218 0.36743 2017 8 11 57976 0.1805 0.4206 0.36684 2017 8 12 57977 0.1815 0.4195 0.36614 2017 8 13 57978 0.1824 0.4183 0.36539 2017 8 14 57979 0.1834 0.4171 0.36465 2017 8 15 57980 0.1843 0.4159 0.36396 2017 8 16 57981 0.1852 0.4147 0.36335 2017 8 17 57982 0.1861 0.4134 0.36284 2017 8 18 57983 0.1870 0.4122 0.36239 2017 8 19 57984 0.1878 0.4109 0.36194 2017 8 20 57985 0.1886 0.4097 0.36144 2017 8 21 57986 0.1894 0.4084 0.36082 2017 8 22 57987 0.1902 0.4071 0.36009 2017 8 23 57988 0.1909 0.4058 0.35926 2017 8 24 57989 0.1916 0.4045 0.35836 2017 8 25 57990 0.1923 0.4031 0.35747 2017 8 26 57991 0.1929 0.4018 0.35662 2017 8 27 57992 0.1936 0.4005 0.35585 2017 8 28 57993 0.1942 0.3991 0.35519 2017 8 29 57994 0.1947 0.3977 0.35462 2017 8 30 57995 0.1953 0.3964 0.35414 2017 8 31 57996 0.1958 0.3950 0.35371 2017 9 1 57997 0.1963 0.3936 0.35331 2017 9 2 57998 0.1967 0.3922 0.35289 2017 9 3 57999 0.1972 0.3908 0.35239 2017 9 4 58000 0.1976 0.3894 0.35179 2017 9 5 58001 0.1980 0.3880 0.35104 2017 9 6 58002 0.1983 0.3865 0.35012 2017 9 7 58003 0.1987 0.3851 0.34904 2017 9 8 58004 0.1990 0.3837 0.34783 2017 9 9 58005 0.1992 0.3822 0.34654 2017 9 10 58006 0.1995 0.3808 0.34525 2017 9 11 58007 0.1997 0.3794 0.34402 2017 9 12 58008 0.1999 0.3779 0.34289 2017 9 13 58009 0.2000 0.3765 0.34187 2017 9 14 58010 0.2002 0.3750 0.34092 2017 9 15 58011 0.2003 0.3736 0.34000 2017 9 16 58012 0.2004 0.3721 0.33904 2017 9 17 58013 0.2004 0.3706 0.33799 2017 9 18 58014 0.2004 0.3692 0.33682 2017 9 19 58015 0.2004 0.3677 0.33553 2017 9 20 58016 0.2004 0.3663 0.33415 2017 9 21 58017 0.2003 0.3648 0.33274 2017 9 22 58018 0.2002 0.3634 0.33135 2017 9 23 58019 0.2001 0.3619 0.33003 2017 9 24 58020 0.2000 0.3605 0.32880 2017 9 25 58021 0.1998 0.3590 0.32769 2017 9 26 58022 0.1996 0.3576 0.32667 2017 9 27 58023 0.1994 0.3561 0.32574 2017 9 28 58024 0.1991 0.3547 0.32485 2017 9 29 58025 0.1988 0.3533 0.32396 2017 9 30 58026 0.1985 0.3518 0.32302 2017 10 1 58027 0.1982 0.3504 0.32199 2017 10 2 58028 0.1978 0.3490 0.32084 2017 10 3 58029 0.1974 0.3476 0.31952 2017 10 4 58030 0.1970 0.3462 0.31803 2017 10 5 58031 0.1965 0.3448 0.31638 2017 10 6 58032 0.1961 0.3434 0.31464 2017 10 7 58033 0.1956 0.3420 0.31286 2017 10 8 58034 0.1951 0.3407 0.31113 2017 10 9 58035 0.1945 0.3393 0.30951 2017 10 10 58036 0.1939 0.3379 0.30803 2017 10 11 58037 0.1933 0.3366 0.30667 2017 10 12 58038 0.1927 0.3352 0.30537 2017 10 13 58039 0.1921 0.3339 0.30409 2017 10 14 58040 0.1914 0.3326 0.30275 2017 10 15 58041 0.1907 0.3313 0.30132 2017 10 16 58042 0.1900 0.3300 0.29979 2017 10 17 58043 0.1892 0.3287 0.29817 2017 10 18 58044 0.1884 0.3275 0.29650 2017 10 19 58045 0.1876 0.3262 0.29484 2017 10 20 58046 0.1868 0.3250 0.29324 2017 10 21 58047 0.1860 0.3237 0.29173 2017 10 22 58048 0.1851 0.3225 0.29033 2017 10 23 58049 0.1842 0.3213 0.28906 2017 10 24 58050 0.1833 0.3201 0.28791 2017 10 25 58051 0.1824 0.3189 0.28685 2017 10 26 58052 0.1814 0.3178 0.28584 2017 10 27 58053 0.1805 0.3166 0.28484 2017 10 28 58054 0.1795 0.3155 0.28378 2017 10 29 58055 0.1784 0.3144 0.28262 2017 10 30 58056 0.1774 0.3133 0.28130 2017 10 31 58057 0.1764 0.3122 0.27979 2017 11 1 58058 0.1753 0.3111 0.27809 2017 11 2 58059 0.1742 0.3101 0.27621 2017 11 3 58060 0.1731 0.3091 0.27423 2017 11 4 58061 0.1719 0.3080 0.27223 2017 11 5 58062 0.1708 0.3070 0.27031 2017 11 6 58063 0.1696 0.3061 0.26852 2017 11 7 58064 0.1684 0.3051 0.26687 2017 11 8 58065 0.1672 0.3042 0.26536 2017 11 9 58066 0.1660 0.3032 0.26393 2017 11 10 58067 0.1648 0.3023 0.26253 2017 11 11 58068 0.1635 0.3015 0.26108 2017 11 12 58069 0.1622 0.3006 0.25953 2017 11 13 58070 0.1610 0.2998 0.25789 2017 11 14 58071 0.1597 0.2989 0.25623 2017 11 15 58072 0.1584 0.2981 0.25454 2017 11 16 58073 0.1570 0.2974 0.25283 2017 11 17 58074 0.1557 0.2966 0.25118 2017 11 18 58075 0.1543 0.2959 0.24964 2017 11 19 58076 0.1530 0.2951 0.24826 2017 11 20 58077 0.1516 0.2944 0.24701 2017 11 21 58078 0.1502 0.2938 0.24589 2017 11 22 58079 0.1488 0.2931 0.24483 2017 11 23 58080 0.1474 0.2925 0.24378 2017 11 24 58081 0.1460 0.2919 0.24267 2017 11 25 58082 0.1445 0.2913 0.24149 2017 11 26 58083 0.1431 0.2907 0.24022 2017 11 27 58084 0.1417 0.2902 0.23880 2017 11 28 58085 0.1402 0.2897 0.23725 2017 11 29 58086 0.1387 0.2892 0.23557 2017 11 30 58087 0.1373 0.2887 0.23377 2017 12 1 58088 0.1358 0.2883 0.23186 2017 12 2 58089 0.1343 0.2878 0.22992 2017 12 3 58090 0.1328 0.2874 0.22805 2017 12 4 58091 0.1313 0.2871 0.22630 2017 12 5 58092 0.1298 0.2867 0.22470 2017 12 6 58093 0.1283 0.2864 0.22319 2017 12 7 58094 0.1267 0.2861 0.22170 2017 12 8 58095 0.1252 0.2858 0.22016 2017 12 9 58096 0.1237 0.2855 0.21853 2017 12 10 58097 0.1222 0.2853 0.21685 2017 12 11 58098 0.1206 0.2851 0.21515 2017 12 12 58099 0.1191 0.2849 0.21350 2017 12 13 58100 0.1176 0.2847 0.21194 2017 12 14 58101 0.1160 0.2846 0.21046 2017 12 15 58102 0.1145 0.2845 0.20913 2017 12 16 58103 0.1130 0.2844 0.20798 2017 12 17 58104 0.1114 0.2843 0.20701 2017 12 18 58105 0.1099 0.2843 0.20620 2017 12 19 58106 0.1084 0.2842 0.20550 2017 12 20 58107 0.1068 0.2843 0.20488 2017 12 21 58108 0.1053 0.2843 0.20423 2017 12 22 58109 0.1038 0.2843 0.20346 2017 12 23 58110 0.1023 0.2844 0.20255 2017 12 24 58111 0.1007 0.2845 0.20150 2017 12 25 58112 0.0992 0.2846 0.20031 2017 12 26 58113 0.0977 0.2848 0.19901 2017 12 27 58114 0.0962 0.2850 0.19760 2017 12 28 58115 0.0947 0.2852 0.19614 2017 12 29 58116 0.0932 0.2854 0.19467 2017 12 30 58117 0.0917 0.2856 0.19322 2017 12 31 58118 0.0902 0.2859 0.19181 2018 1 1 58119 0.0887 0.2862 0.19048 2018 1 2 58120 0.0873 0.2865 0.18924 2018 1 3 58121 0.0858 0.2868 0.18795 2018 1 4 58122 0.0844 0.2872 0.18653 2018 1 5 58123 0.0829 0.2876 0.18502 2018 1 6 58124 0.0815 0.2880 0.18344 2018 1 7 58125 0.0801 0.2884 0.18180 2018 1 8 58126 0.0786 0.2888 0.18011 2018 1 9 58127 0.0772 0.2893 0.17841 2018 1 10 58128 0.0758 0.2898 0.17676 2018 1 11 58129 0.0745 0.2903 0.17517 2018 1 12 58130 0.0731 0.2909 0.17375 2018 1 13 58131 0.0717 0.2914 0.17252 2018 1 14 58132 0.0704 0.2920 0.17138 2018 1 15 58133 0.0691 0.2926 0.17034 2018 1 16 58134 0.0677 0.2932 0.16939 2018 1 17 58135 0.0664 0.2938 0.16847 2018 1 18 58136 0.0651 0.2945 0.16752 2018 1 19 58137 0.0639 0.2952 0.16653 2018 1 20 58138 0.0626 0.2959 0.16546 2018 1 21 58139 0.0614 0.2966 0.16425 2018 1 22 58140 0.0601 0.2974 0.16295 2018 1 23 58141 0.0589 0.2981 0.16157 2018 1 24 58142 0.0577 0.2989 0.16011 2018 1 25 58143 0.0565 0.2997 0.15862 2018 1 26 58144 0.0554 0.3005 0.15712 2018 1 27 58145 0.0542 0.3013 0.15572 2018 1 28 58146 0.0531 0.3022 0.15438 2018 1 29 58147 0.0520 0.3031 0.15307 2018 1 30 58148 0.0509 0.3039 0.15176 2018 1 31 58149 0.0498 0.3048 0.15036 2018 2 1 58150 0.0488 0.3058 0.14881 2018 2 2 58151 0.0477 0.3067 0.14711 2018 2 3 58152 0.0467 0.3076 0.14527 2018 2 4 58153 0.0457 0.3086 0.14331 2018 2 5 58154 0.0448 0.3096 0.14132 2018 2 6 58155 0.0438 0.3106 0.13938 2018 2 7 58156 0.0429 0.3116 0.13754 2018 2 8 58157 0.0420 0.3126 0.13583 2018 2 9 58158 0.0411 0.3137 0.13421 2018 2 10 58159 0.0402 0.3147 0.13267 2018 2 11 58160 0.0394 0.3158 0.13120 2018 2 12 58161 0.0386 0.3169 0.12979 2018 2 13 58162 0.0378 0.3180 0.12834 2018 2 14 58163 0.0370 0.3191 0.12681 2018 2 15 58164 0.0362 0.3202 0.12520 2018 2 16 58165 0.0355 0.3213 0.12343 2018 2 17 58166 0.0348 0.3225 0.12150 2018 2 18 58167 0.0341 0.3236 0.11939 2018 2 19 58168 0.0334 0.3248 0.11709 2018 2 20 58169 0.0328 0.3260 0.11470 2018 2 21 58170 0.0322 0.3271 0.11235 2018 2 22 58171 0.0316 0.3283 0.11011 2018 2 23 58172 0.0310 0.3295 0.10799 2018 2 24 58173 0.0305 0.3307 0.10599 2018 2 25 58174 0.0300 0.3319 0.10407 2018 2 26 58175 0.0295 0.3332 0.10216 2018 2 27 58176 0.0290 0.3344 0.10023 2018 2 28 58177 0.0286 0.3356 0.09823 2018 3 1 58178 0.0282 0.3369 0.09614 2018 3 2 58179 0.0278 0.3381 0.09399 2018 3 3 58180 0.0274 0.3394 0.09184 2018 3 4 58181 0.0271 0.3407 0.08973 2018 3 5 58182 0.0268 0.3419 0.08764 2018 3 6 58183 0.0265 0.3432 0.08561 2018 3 7 58184 0.0262 0.3445 0.08370 2018 3 8 58185 0.0260 0.3458 0.08193 2018 3 9 58186 0.0258 0.3471 0.08030 2018 3 10 58187 0.0256 0.3483 0.07879 2018 3 11 58188 0.0254 0.3496 0.07735 2018 3 12 58189 0.0253 0.3509 0.07596 2018 3 13 58190 0.0252 0.3522 0.07460 2018 3 14 58191 0.0251 0.3535 0.07319 2018 3 15 58192 0.0251 0.3548 0.07164 2018 3 16 58193 0.0250 0.3561 0.06994 2018 3 17 58194 0.0250 0.3574 0.06810 2018 3 18 58195 0.0251 0.3587 0.06618 2018 3 19 58196 0.0251 0.3600 0.06423 2018 3 20 58197 0.0252 0.3613 0.06225 2018 3 21 58198 0.0253 0.3626 0.06026 2018 3 22 58199 0.0254 0.3639 0.05831 2018 3 23 58200 0.0256 0.3652 0.05648 2018 3 24 58201 0.0257 0.3665 0.05479 2018 3 25 58202 0.0260 0.3677 0.05317 2018 3 26 58203 0.0262 0.3690 0.05154 2018 3 27 58204 0.0264 0.3703 0.04989 2018 3 28 58205 0.0267 0.3716 0.04811 2018 3 29 58206 0.0270 0.3728 0.04618 2018 3 30 58207 0.0274 0.3741 0.04413 These predictions are based on all announced leap seconds. CELESTIAL POLE OFFSET SERIES: NEOS Celestial Pole Offset Series MJD dpsi error deps error (msec. of arc) 57820 -99.95 0.30 -11.24 0.03 57821 -99.62 0.30 -11.28 0.03 57822 -99.30 0.30 -11.29 0.03 57823 -99.11 0.14 -11.34 0.04 57824 -99.08 0.11 -11.49 0.03 57825 -99.08 0.11 -11.70 0.03 57826 -99.09 0.30 -11.83 0.15 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 57820 -0.221 0.119 -0.043 0.030 57821 -0.260 0.119 -0.056 0.030 57822 -0.288 0.119 -0.068 0.030 57823 -0.290 0.056 -0.063 0.040 57824 -0.289 0.044 -0.060 0.030 57825 -0.285 0.044 -0.080 0.030 57826 -0.289 0.119 -0.089 0.150 The recommended software to predict celestial pole offsets can be found at and software for the calculation of the dX and dY components with respect to IAU2000A Nutation/Precession Theory can be found at the web site in Chapter 5 Section 5.5 of the IERS Conventions (2010).